A primary care NP orders thyroid function tests. The patient's TSH is 1.2 microunits/mL, and T4 is 1.7 ng/mL. The NP should:
a. assess the patient for symptoms of hyperthyroidism.
b. ask the patient about the use of medications such as lithium.
c. tell the patient that the results most likely indicate hypothyroidism.
d. ask an endocrinologist to evaluate for possible Hashimoto's thyroiditis.
C
Primary hypothyroidism is the most common form of hypothyroidism. Use of certain drugs, such as lithium, and diseases such as Hashimoto's thyroiditis can cause hypothyroidism but are less likely. The patient does not have signs of hyperthyroidism.
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